512-rear chassis fan not detected

[mohammed-halima]

hi all

today i replaced a new cpu fan.
and the new one working fine,but there are a problem,if i turned my pc on,i got a bios message,this::(Error 512 - rear chassis fan not detected).
if i press f1 my pc will run normaly and i can see my windows 8

can someone help me please?

ihave:-
windows 8
ram 7168mb hddr2
video card 1gb
product name:hp compaq dc7800p convertible minitower
sysem bios 786f1 v01.32
processor: intel (R) core(tm)2 cpu 6400 2.13GHz

[mohammed-halima]

what can i do to remove this message ?my fan work fine!

[mohammed-halima · Accepted solution]

hp support is very bad !!

i don't need any help from this support, because i fixed it !

thank you for nothing!!!!!!!

[foehammer111]

What is the fix for this issue?  I am having the same issue with a HP ENVY Phoenix 800-030qe CTO Desktop PC.

I have reseated the fan from the system board, but still having the same problem.  Fan is running, so it's probably a false positive error message.  Unable to find an option in the BIOS to disable this message, and no BIOS updates on the HP website.

I spent nearly 2 hours on the phone with HP support, and didn't get anywhere.  Despite this being a common problem.  Any help would be greatly appreciated!

[Lil_Lisa27]

Hi foehammer111,

I understand that you are getting the error 51-rear chassis fan not detected. I have been able to another thread with the same error and excellent trouble shooting steps. I have included the link to that thread <here>, and look at the post from lasvegaswireman.

Please let me know how this works for you.

[foehammer111]

Unfortunately this did not fix the issue. I did these steps both prior to calling HP, and while on the phone with HP.

After troubleshooting with them, I was told to send the computer in and it would be wiped. There is no problem with the fan. It's running with no issues. Clearly this is a false positive error message. Something that a BIOS update should fix, but there are no updates for this PC.

[Lil_Lisa27]

Hi foehammer111,

Thank you for your reply. Hopefully with sending the computer into the repair center will resolve the issue for you.

[Uncas]

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@mohammed-halima wrote:

hp support is very bad !!

i don't need any help from this support, because i fixed it !

thank you for nothing!!!!!!!

---

Hi Mohammed,

So how did you finally fix it?  Care to share?